| Topuzlu Dam | |
|---|---|
  Location of Topuzlu Dam in Istanbul | |
| Official name | Topuzlu Bent |
| Country | Turkey |
| Location | Bahçeköy, Sarıyer, Istanbul Province |
| Coordinates | 41°10′58″N 28°59′36″E / 41.18278°N 28.99333°E |
| Opening date | 1750 |
| Dam and spillways | |
| Type of dam | Solid gravity dam |
| Impounds | Eskibağlar Creek |
| Height (thalweg) | 14.00 m (45.93 ft) |
| Length | 80.65 m (264.6 ft) |
| Width (crest) | 4.30 m (14.1 ft) |
| Width (base) | 7.00 m (22.97 ft) |
| Reservoir | |
| Total capacity | 160,000 m3 (5,700,000 cu ft) |
| Catchment area | 0.92 km2 (0.36 sq mi) |
Topuzlu Dam (Turkish: Topuzlu Bent) is a historic dam located in Sarıyer district of Istanbul Province in Turkey.
Topuzlu Dam was built in 1750 by Ottoman Sultan Mahmud I (reigned 1730–1754). In 1786, its crest was raised about 3.40 m (11.2 ft) higher by Abdul Hamid I (reigned 1774–1789).[1] The dam is named "Topuzlu" meaning "bulged" due to a bulge-formed central part of the upstream wall side.
The dam is situated just north of Bahçeköy, Sarıyer inside the Bentler Nature Park, which is part of the Belgrad Forest.[2][3]
Topuzlu Dam impounds Eskibağlar Creek and has a catchment area of 0.92 km2 (0.36 sq mi). It is a solid gravity dam constructed in masonry. The dam is 14.00 m (45.93 ft) high from the thalweg and 80.65 m (264.6 ft) long at crest. The crest is 4.30 m (14.1 ft) and the base is 7.00 m (22.97 ft) wide. The dam has a reservoir capacity of 160,000 m3 (5,700,000 cu ft).